How many wastewater permits expire in New York in 2027?

52 NPDES permits held by publicly owned wastewater treatment plants in New York expire in 2027, covering a combined average flow of 1,009 MGD. The busiest month is Jun 2027 with 16 expiries.

What happens when an NPDES permit expires?

The plant must have applied for renewal at least 180 days before the expiry date. If the agency has not reissued the permit by then, the old permit is administratively continued and stays enforceable. The reissued permit typically carries updated effluent limits based on the latest water-quality standards, which is what drives upgrade projects.

Which is the largest plant with a permit expiring in New York in 2027?

Newtown Creek Water Pollution Control Plant in Brooklyn, treating about 188 MGD under permit NY0026204, expiring Jun 2027.

How do I get contacts for the plants on this list?

Every plant links to its profile with flow, technology and compliance data. Verified decision-maker contacts for each plant, and the same list for every state and year, are available in Klarifi with a free trial.

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New York wastewater permits expiring in 2027

Name: New York NPDES permits expiring in 2027
Creator: Klarifi
License: https://klarifi.io/terms-of-service

52 NPDES permits · 1,009 MGD combined average flow

52 publicly owned wastewater treatment plants in New York hold NPDES permits that expire during 2027, issued by New York State Department of Environmental Conservation. The table lists each plant with its permit number, expiry month, average flow, treatment technology and three-year violation count, in order of expiry.

An NPDES permit runs for five years. To keep discharging, a plant must apply for renewal at least 180 days before the expiry date, and the renewed permit usually arrives with tighter effluent limits, new monitoring requirements or a compliance schedule. That is why the year a permit expires is the year a plant starts budgeting for upgrades: nutrient removal, disinfection, capacity or controls.

Other years:

2026 (41)2028 (47)All New York NPDES permits →

Publicly owned wastewater treatment plants in New York with NPDES permits expiring in 2027, from EPA ICIS-NPDES records. Refreshed on every release.
Facility	City	Avg flow (MGD)	NPDES permit	Expires	Technology	Violations (3y)
Village Of Great Neck STP	Great Neck	2.5	NY0026999	Jan 2027	Clarifiers, Carrousels / oxidation ditches, Biogas balloons	1
Jordan STP	Jordan	0.05	NY0105007	Jan 2027	—	3
Washington Co Sd#2 WWTP	Fort Edward	1.3	NY0183695	Feb 2027	Clarifiers, Biogas silos	19
Hopewell Hamlet Sewer District	Hopewell Junction	0.1	NY0267953	Feb 2027	—	34
Constableville (v) STP	Constableville	0.02	NY0110418	Feb 2027	—	24
Napanoch Sewer Imp Area	Napanoch	—	NY0029718	Feb 2027	Clarifiers, Uncovered lagoons	4
Corning (c) WWTP	Corning	0.81	NY0025721	Mar 2027	Clarifiers, Biogas silos	7
Park Guilderland NE Ind WWTP	Guilderland	0.11	NY0022217	Mar 2027	Aerated lagoons, Uncovered lagoons	9
Freeville (v) WWTP	Freeville	0.04	NY0110493	Mar 2027	Aerated lagoons, Uncovered lagoons	69
Rensselaer Falls WWTP	Rensselaer Falls	0.02	NY0257613	Mar 2027	—	9
Patchogue (v) WWTP	Patchogue	0.38	NY0023922	Apr 2027	Clarifiers, Biogas balloons	10
Holland (t) STP	Holland	0.1	NY0108103	Apr 2027	Clarifiers	2
Middleburgh (v) WWTP	Middleburgh	0.05	NY0192309	Apr 2027	—	1
Akron (v) WWTP	Akron	0.27	NY0031003	May 2027	Biogas silos, Biogas balloons	0
South Corning WWTP	Corning	0.06	NY0110531	May 2027	Clarifiers, Carrousels / oxidation ditches	11
Robin Meadows Sd	Slate Hill	0.03	NY0029149	May 2027	—	12
Elma (t) Sd#7-Pond Brook Townhomes	Elma	0.0035	NY0203360	May 2027	—	5
Newtown Creek Water Pollution Control Plant	Brooklyn	188	NY0026204	Jun 2027	Clarifiers, Biogas silos, Biogas balloons	5
NYC-DEP Wards Island WPCP	Manhattan	174	NY0026131	Jun 2027	Clarifiers, Biogas silos	25
Hunts Point Water Pollution Control Plant	Bronx	109	NY0026191	Jun 2027	Clarifiers, Biogas silos	11
Nycdep - Bowery Bay WRRF	Astoria	94	NY0026158	Jun 2027	Clarifiers, Biogas silos	10
Owls Head Water Pollution Control Plant	Brooklyn	88	NY0026166	Jun 2027	Biogas silos	9
Coney Island Water Pollution Control Plant	Brooklyn	83	NY0026182	Jun 2027	—	8
Jamaica Water Pollution Control Plant	Jamaica	70	NY0026115	Jun 2027	Clarifiers, Biogas silos	10
Tallman Island Wastewater Treatment Plant	Queens	57	NY0026239	Jun 2027	Clarifiers, Biogas balloons	2
NYC DEP 26 Ward WPCP	Brooklyn	43	NY0026212	Jun 2027	Biogas silos	13
Nycdep - Red Hook WPCP	Brooklyn	28	NY0027073	Jun 2027	Biogas silos	2
Nycdep - Oakwood Beach WPCP	Staten Island	25.4	NY0026174	Jun 2027	Biogas silos, Biogas balloons	6
Port Richmond Water Pollution Control Plant	Staten Island	21	NY0026107	Jun 2027	Clarifiers, Biogas silos	4
New York (c) - Rockaway WPCP	Rockaway Park	20	NY0026221	Jun 2027	Biogas silos	3
Western Wayne County Regional Wastewater Treatment Plant	Palmyra, Town Of	0.62	NY0272141	Jun 2027	Clarifiers, Biogas silos, Biogas balloons	34
Manchester-Shortville Jnt STP	Manchester	0.17	NY0030813	Jun 2027	—	0
Wayland (v) STP	Wayland	0.09	NY0032999	Jun 2027	Clarifiers	20
Warwick (v) WWTP	Warwick	0.62	NY0023680	Jul 2027	—	31
Nichols (t) STP	Nichols	0.11	NY0262480	Jul 2027	—	21
Marlboro WWTP	Marlboro	0.09	NY0109720	Jul 2027	Clarifiers, Carrousels / oxidation ditches	4
Cherry Creek (t) WWTP	Cherry Creek	0.01	NY0204081	Jul 2027	Clarifiers	39
Hidden Valley Estates Sd	Otisville	0.02	NY0034436	Aug 2027	—	7
Limestone WWTP	Limestone	0.11	NY0029068	Sep 2027	Aerated lagoons	26
Fort Brewerton WWTP	Central Square	0.09	NY0245062	Sep 2027	—	12
Country Manor STP	Mahopac	0.04	NY0029017	Sep 2027	—	5
Lake Huntington Sd	Narrowsburg	0.02	NY0030694	Sep 2027	—	4
N. Lawrence & Nicholville STP	North Lawrence	0.02	NY0110116	Sep 2027	Uncovered lagoons	97
Honeoye Lake Co Consolidated Sd	Honeoye	0.19	NY0107255	Oct 2027	Clarifiers	46
Fleetwood Manor Sd WWTP	Wappingers Falls	0.02	NY0021601	Oct 2027	—	7
Fine - T Wanakena Sewer District	Wanakena	0.004	NY0034533	Oct 2027	—	2
Kerhonkson WWTF	Ellenville	0.02	NY0109924	Nov 2027	—	1
Parish (v) WWTP	Parish	0.02	NY0107654	Nov 2027	Biogas balloons	129
Dover Ridge Estates STP	Poughquag	0.01	NY0164933	Nov 2027	—	23
Mexico - V STP	Mexico	0.12	NY0036617	Dec 2027	Uncovered lagoons	10
Aurora (v) WWTP	Aurora	0.06	NY0023558	Dec 2027	—	5
Canaseraga (v) WWTF	Canaseraga	0.02	NY0269573	Dec 2027	—	378

New York permit renewals in 2027: questions

Sources and methodology

Flow, permit and violation figures come from the EPA's ICIS-NPDES discharge monitoring records. Population served comes from the Clean Watersheds Needs Survey 2022. Treatment structures are identified by Klarifi's review of aerial imagery, and capital improvement projects are extracted from published municipal budget documents. Violations are counted over the last three years of monitoring reports.

Data refreshed September 11, 2026.

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